The clicking noises are the kick start lever coming back up from engagement, and clacking as it turns the rear of the input shaft. That was one I learned when rebuilding the gearbox.
Compression seems good, so I guess it's down to two things: spark (as recommended) and a proper fuel/air mixture -- and not having an audience around when I try and start it, of course.
Ok, noob question regarding fuel/air: the carburetor should be jetted according to its model, and not
to the bike it will be used on, correct? That is to say, I have Bing 64/32/11-/12 carbs, which were originally intended for the R90/6. My carbs have the correct jets in them for the /11-/12 model according to the Bing manual. However, I noticed the carbs for the R75/5 had smaller jets. I should use the stock jets for the /11-/12 carbs, not the jets used on the R75/5 carbs, right?
Does that make any sense?
UPDATE: No spark.